36 PATAGONIAN EXPEDITIONS I PALAEONTOLOGY. 
No. 
No. 
No. 
No. 
15,828. 
9565 - 
' 5 , 59 s - 
9149. 
Lower dentition, length Iy-My 
.059 
.0565 
“ “ “ Py-My on alveolar 
border ...... 
.044 
.0415 
•039 
Lower dentition, length My-My on alveolar 
border . . ... 
.026 
.0235 
.0228 
Iy, width of crown ..... 
.002 
.002 
“ greatest transverse diameter 
.0023 
.0019 
Iy, width of crown ..... 
.0027 
.0025 
.0026 
“ greatest transverse diameter 
.0025 
.002 
.002 
Iy, width of crown ..... 
.004 
.004 
“ greatest transverse diameter 
.0025 
.002 
C, width of crown ..... 
.005 
.0045 
.0045 
“ greatest transverse diameter 
P T , antero-posterior diameter on triturating 
.0027 
.0026 
.0023 
surface ...... 
.0045 
.0055 
.005 
“ greatest transverse diameter 
Py, antero-posterior diameter on triturating 
.003 
.0022 
.0025 
surface ...... 
l n 
O 
q 
.0045 
b 
0 
“ greatest transverse diameter 
Py, antero-posterior diameter on triturating 
.003 
.003 
.0025 
surface ...... 
.0055 
.0053 
.005 
“ greatest transverse diameter 
Py, antero-posterior diameter on triturating 
.0034 
.003 
.003 
surface ...... 
.0067 
.0065 
.006 
“ greatest transverse diameter 
My, antero-posterior diameter on triturating 
.004 
.0035 
.0035 
surface ...... 
.009 
.008 
.007* 
“ greatest transverse diameter 
M^, antero-posterior diameter on triturating 
.0045 
.004 
.0035 
surface ...... 
.0085 
.0075 
.0073 
“ greatest transverse diameter 
My, antero-posterior diameter on triturating 
.0042 
.004 
.0035 
surface ...... 
.010 
.009 
.0083 
“ greatest transverse diameter 
.0037 
No. 
.0032 
.0032 
I 565 I- 
Atlas, approximate width across transverse 
processes ...... 
.032 
Atlas, width across anterior articular surfaces 
.020 
“ “ “ posterior “ “ 
.020 
“ “ of neural arch 
.009 
Axis, length including odontoid, but exclusive 
of distal epiphysis .... 
.0205 
* Approximate. 
